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Article of the Day

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Last Build Date: Wed, 20 Sep 2017 05:00:00 GMT

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Lapis Lazuli

Wed, 20 Sep 2017 05:00:00 GMT

(image) Lapis lazuli is a semiprecious stone prized since antiquity for its intense blue color. It has been mined in Afghanistan for 6,500 years, and the discovery of artifacts at several Predynastic Egyptian and Neolithic sites indicates widespread early trade in the stone. Powdered lapis was used until the 19th century to make blue pigment and may have even been used as eye shadow by Cleopatra. Today, much of what is sold as lapis lazuli is actually dyed jasper. Where does lapis lazuli get its name? Discuss

Tarring and Feathering

Tue, 19 Sep 2017 05:00:00 GMT

(image) Dating at least to the Crusades, tarring and feathering is a physical punishment that was used to enforce formal justice in feudal Europe and, later, vigilante justice in the American frontier. The practice involves stripping victims to the waist, covering them in hot tar and feathers, and often parading them around in public with the intent of causing enough harm and humiliation to drive them out of town. In 2007, a Belfast man was tarred and feathered for doing what?


Mon, 18 Sep 2017 05:00:00 GMT

(image) Radiolarians are a highly diverse group of marine protozoa widely recognized for their intricately ornate mineral skeletons. Part of the plankton community, radiolarians have a fossil record that extends back to the early Paleozoic era. Because they have undergone continuous evolutionary change, they are often used to analyze the layers of the marine sedimentary record. What German biologist produced exquisite drawings of radiolarians that helped to popularize them among Victorian microscopists?